645415313 has 8 divisors (see below), whose sum is σ = 681006720. Its totient is φ = 609986160.

The previous prime is 645415283. The next prime is 645415339. The reversal of 645415313 is 313514546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 645415313 - 2⁶ = 645415249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 645415313.

It is not an unprimeable number, because it can be changed into a prime (645415373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32345 + ... + 48342.

It is an arithmetic number, because the mean of its divisors is an integer number (85125840).

Almost surely, 2^645415313 is an apocalyptic number.

It is an amenable number.

645415313 is a deficient number, since it is larger than the sum of its proper divisors (35591407).

645415313 is a wasteful number, since it uses less digits than its factorization.

645415313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81127.

The product of its digits is 21600, while the sum is 32.

The square root of 645415313 is about 25405.0253493280. The cubic root of 645415313 is about 864.1976646981.

Adding to 645415313 its reverse (313514546), we get a palindrome (958929859).

The spelling of 645415313 in words is "six hundred forty-five million, four hundred fifteen thousand, three hundred thirteen".